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Conformal coating shielding method of circuit board

A circuit board and conformal paint technology, applied in the field of painting, can solve problems such as poor shielding effect and difficult mold design and operation, and achieve the effects of high production efficiency, reduced production cost, and improved production efficiency

Inactive Publication Date: 2013-05-01
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mold is easy to operate and easy to disassemble, the shielding effect is not good, and the mold design and operation are difficult for devices with complex shapes

Method used

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  • Conformal coating shielding method of circuit board
  • Conformal coating shielding method of circuit board
  • Conformal coating shielding method of circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, according to the geometric shape and size of the radiator on the circuit board, the masking rubber sleeve is made. Before coating, the masking rubber sleeve is placed on the radiator, and then the conformal paint is applied. The masking rubber sleeve has a shielding effect and ensures The radiator is not polluted by the conformal paint, and the heat dissipation effect is not affected.

Embodiment 2

[0040] Such as figure 2 As shown, according to the geometric shape and size of the digital display module on the circuit board, the masking rubber sleeve is made. Before coating, the masking rubber sleeve is placed on the digital display module, and then the conformal paint is applied. The masking rubber sleeve has a shielding effect. , to ensure that the digital display module is not polluted by the three anti-paint, and does not react with the three anti-paint, thereby ensuring the display effect of the digital display module.

Embodiment 3

[0042] Such as image 3 As shown, the masking rubber sleeve is made according to the geometry and size of the AMP socket on the circuit board. The three-proof paint will not climb to the pins due to capillary phenomenon, so as to ensure that the device pins on the socket will not be insulated from the socket pins due to the pollution of the three-proof paint, which will affect the conduction performance of the product.

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Abstract

The invention provides a conformal paint coating shielding method of a circuit board, comprising the following steps: manufacturing a shielding rubber sleeve according to circuit board products of different types; and in the process of spraying and coating, sheathing the shielding rubber sleeve on certain parts, incapable of being sprayed, of the circuit board for shielding, wherein the shieldingrubber sleeve is made of anti-static rubber, and can be prevented from generating static electricity in the plugging and pulling process and further damaging electrostatic-sensitive devices on the circuit board, and the rubber sleeve is in an elastic design, is made of high-temperature-resistant inertial rubber, does not generate reaction and bonding with a conformal paint, and can be repeatedly used. The conformal coating shielding method is more suitable for devices in complex shapes of the circuit board, the electrostatic hazards can be eliminated, the efficiency is high, effective shielding can be formed, the spraying quality can be effectively guaranteed, the control is easy, and the repeated use of the rubber sleeve ensures that the cost in actual production is lowered.

Description

technical field [0001] The invention relates to painting technology, in particular to a coating and shielding method of a circuit board conformal paint. Background technique [0002] During use, the circuit board may be in different environments, such as chemical substances (fuel, coolant, etc.), vibration, high dust, salt spray, humidity and high temperature, etc., so the circuit board will be corroded, softened, deformed, moldy, etc. Change and other problems, resulting in circuit board circuit failure. The three-proof paint is a special formula coating. The three-proof paint is applied to the surface of the circuit board to form a layer of three-proof protective film (three-proof refers to moisture-proof, salt-spray proof, and mildew-proof). The protective film can Protect the circuit from damage in chemical, vibration, high dust, salt spray, humidity and high temperature environments, improve the reliability of the circuit board, and increase its safety factor. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/28
Inventor 刘新胜张克端姜丽璠刘丹杨丽娜王婕张瑶王萍徐璐李强刘华
Owner CHINA NORTH VEHICLE RES INST